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. 2015 Oct 6;5:14787. doi: 10.1038/srep14787

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Film thicknesses: first column (a,d,g) – chromium/gold = 2 nm/100 nm, second column (b,e,h) – chromium/gold = 5 nm/100 nm and third column (c,f,i) – chromium/gold = 10 nm/100 nm. Mask sizes: first row (a–c) = 600 μm × 600 μm, second row (d–f) = 300 μm × 300 μm and third row (g–i) = 100 μm × 100 μm. D = 1500 J. (j) a 3D optical profile image of the mesa feature following removal of the chromium/gold thin film.